COMPOSITION FOR ENROBING QUARTZ OPTICAL FIBER AND FIBER LIGHT GUIDE THUS ENROBED Russian patent published in 2005 - IPC

FIELD: optical engineering.

SUBSTANCE: invention, in particular, relates to UV solidifying composition based on urethane acrylates and containing 6.0-19.3 wt parts of hydroxyalkylacrylate and 1-5 wt parts of light initiator, said urethane acrylate base being mixture of 30.0-82.0 wt parts of interaction product of poly(oxypropylene glycol), 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio (1-2):(2-3):(2-2.1):(0.003-0.33)] with 4.7-60.0 wt parts of interaction product of 2,4-tolylenediisocyanate, hydroxypropyl acrylate, and 1,2-propylene glycol [molar ratio 1:(2.5:(0.004-0.065)]. Fiber light guide consisting of quartz optical fiber enrobed by above-defined composition is further described. Loss of light in light guide is thus lowered to 0.42-0.23 dB/km. Rupture strength is thus increased by 7.0 GPa.

EFFECT: increased rupture strength and reduced light loss.

2 cl, 1 tbl, 8 ex